San Martín, Argentina
San Martín, Argentina

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Negri A.E.,Laboratorio TANDAR | Fernandez Niello J.,Laboratorio TANDAR | Fernandez Niello J.,National University of San Martín of Argentina | Arazi A.,Laboratorio TANDAR | And 8 more authors.
AIP Conference Proceedings | Year: 2010

Concentrations of 129I in bovine thyroid and fresh water samples coming from all over Argentina were analyzed by Accelerator Mass Spectrometry (AMS) and total iodine present in samples by Gas Chromatography (GC) and Inductive Coupled Plasma Mass Spectrometry (ICP-MS), respectively. Once we complete this study, it will be the first set of data of this kind from an extended region of the south American subcontinent. © 2010 American Institute of Physics.


Negri A.E.,Laboratorio TANDAR | Niello J.F.,Laboratorio TANDAR | Niello J.F.,National University of San Martín of Argentina | Arazi A.,Laboratorio TANDAR | And 3 more authors.
Journal of Physics: Conference Series | Year: 2011

129I concentrations in bovine thyroid coming from all over Argentina were analyzed by Accelerator Mass Spectrometry and total iodine present in samples by Gas Chromatography. We present a preliminary latitudinal profile of 129I concentrations. Once we complete this study, it will be the first set of data of this kind from an extended region of South America.


Martinez P.,CONICET | Dawidowski L.,Gerencia Quimica | Gomez D.,Gerencia Quimica | Pasquevich D.,CONICET | Pasquevich D.,Bariloche Atomic Center
International Journal of Hydrogen Energy | Year: 2010

We have developed a model to assess the life cycle greenhouse emissions of compressed natural gas-hydrogen (CNG-H2) mixtures used for transportation in Argentina. The overall fuel life cycle is assessed through a well-to-wheel (WTW) analysis for different hydrogen generation and distribution options. The combustion stage in road vehicles is modeled using the COPERT IV model. Hydrogen generation options include classical steam methane reforming (SMR) and water electrolysis (WE) in central plants and distributed facilities at the refueling stations. Centralized hydrogen generation by electrolysis in nuclear plants as well as the use of solar photovoltaic and wind electricity is also considered. Hydrogen distribution options include gas pipeline and refrigerated truck transportation for liquefied hydrogen. A total number of fifteen fuel pathways are studied; in all the cases the natural gas-hydrogen mixture is made at the refueling station. The use of WE using nuclear or wind electricity appears to be less contaminant that the use of pure CNG. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.


Alurralde M.,National University of Central Buenos Aires | Barrera M.,National University of Central Buenos Aires | Barrera M.,CONICET | Bolzi C.G.,National University of Central Buenos Aires | And 32 more authors.
Aerospace Science and Technology | Year: 2013

This paper presents the development of solar arrays for Argentine satellite missions performed within the frame of cooperation agreements between the Argentine National Atomic Energy Commission (CNEA) and the Argentine National Commission for Space Activities (CONAE). Relevant issues such as simulation and design, solar cells characterisation, set up of soldering and bonding processes, radiation damage and development of testing techniques, are reviewed. A chamber for testing solar cells and other devices in a simulated space environment, and the integration and tests of two engineering models for qualification of space technology processes are described. The requirements and solar array design for 3 missions, Aquarius/SAC-D and SAOCOM 1A and 1B, are presented. Finally, the flight model for the SAC-D mission, which was launched on 10 June 2011, is outlined, and telemetry data analysis from the first stages of the mission is presented. © 2012 Elsevier Masson SAS.


Perez Coll C.S.,Institute Investigacion e Ingenieria Ambiental | Pabon Reyes D.C.,Gerencia Quimica | Meichtry J.M.,Gerencia Quimica | Litter M.I.,Gerencia Quimica
One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment | Year: 2014

The present study shows the lethal and sublethal effects of As(V) on early larval development of Rhinella arenarum, the common South American toad, a widely distributed species in Argentina, and the utility of the AMPHITOX test for monitoring changes in the toxicity of As(V) solutions after treatment with zerovalent iron nanoparticles. © 2014 Taylor & Francis Group.


Ghenzi N.,Gerencia de Investigacion y Aplicaciones | Stoliar P.,Gerencia de Investigacion y Aplicaciones | Fuertes M.C.,Gerencia Quimica | Marlasca F.G.,Gerencia de Investigacion y Aplicaciones | Levy P.,Gerencia de Investigacion y Aplicaciones
Physica B: Condensed Matter | Year: 2012

We study the electric pulse induced resistance switching of TiO 2-Ag contacts at room temperature, exploring both unipolar and bipolar switching modes. Initially we observed unipolar response. After hundred pulsing cycles the unipolar switching response vanishes but the device can still be operated in bipolar switching regime. The underlying mechanism for resistance switching is modeled in terms of formation and rupture of filament, and movement of oxygen vacancies. © 2012 Elsevier B.V.

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